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Perhatikan gambar disamping. Besar

Perhatikan gambar disamping. Besar begin mathsize 14px style angle C equals horizontal ellipsis space degree end style 


  1. 26

  2. 36space

  3. 52space

  4. 72space

Jawaban:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell angle A end cell equals cell 180 degree minus 147 degree end cell row cell angle A end cell equals cell 33 degree end cell end table end style 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell angle A plus angle B plus angle C end cell equals cell 180 degree end cell row cell 33 degree plus open parentheses 4 x degree minus 9 degree close parentheses plus 2 x degree end cell equals cell 180 degree end cell row cell 6 x degree end cell equals cell 180 degree minus 33 degree plus 9 degree end cell row cell 6 x degree end cell equals cell 156 degree end cell row x equals cell 26 degree end cell end table end style 

begin mathsize 14px style angle C equals 2 x degree angle C equals open parentheses 2 cross times 26 close parentheses degree angle C equals 52 degree end style 

Maka, jawaban yang benar adalah C.

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